A person has a non-normal set of sex chromosomes but is obviously female. Her cells show two Barr bodies. Which condition accounts for these observations?

XXX

XXY

XYY

XO

Dr. arenas is a scientist who has been trying to determine if increasing pressure will increase the sound that occurs when two chemicals explode. it measures the volume of the sound that occurs at the minimum pressure at which the explosion will occur. it then increases the pressure and measures the volume of the explosions that occur. what kind of investigation is the scientist conducting?